What is "middle white"

The Middle White is a breed of domestic pig native to the United Kingdom. It originated in Yorkshire roughly around the same time as the Large White. Its name comes from the fact that it was between the size of the Large White and the now-extinct Small White. It was fully recognized as a breed in 1884. The breed is known as a pork producer (rather than bacon or lard type pigs), and is best known for its sharply upturned snub nose. It is docile and often kept outdoors in grazing situations. Though its numbers have rebounded somewhat, the breed is listed as endangered by the Rare Breeds Survival Trust.